Revealing the effect of various organic ligands on the OER activity of MOF-derived 3D hierarchical cobalt oxide @ carbon nanostructures

K. Karuppasamy, Ranjith Bose, Dhanasekaran Vikraman, Sivalingam Ramesh, Heung Soo Kim, Emad Alhseinat, Akram Alfantazi, Hyun Seok Kim

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Intensive research work on the robust and highly active non-precious electrocatalysts for oxygen evolution reactions (OERs) under lenient conditions has been attracted much attention to industrialize water-splitting processes. In this work, we design and develop the cost-effective and highly active Co3O4@C nanostructures derived from two different metal-organic framework (MOF) ligands, including terephthalic acid (PA) and trimesic acid (TMA), through a wet chemical strategy. The unique morphologies (donuts and nanorods over a carbon layer) and excellent surface area of the as-prepared catalysts including Co3O4@C-PA and Co3O4@C-TMA are resulted the increased active centers for OER activity. Among the prepared electrocatalysts, Co3O4@C-TMA exhibits favorable Tafel kinetics (85.18 mV dec−1) and small overpotential (320 mV@10 mA cm−2) for oxygen evolution. In addition to design the effective Co3O4@C electrodes for OER activity, this study also proposes the various multi-functional catalysts for renewable energy conversion applications.

Original languageBritish English
Article number167909
JournalJournal of Alloys and Compounds
Volume934
DOIs
StatePublished - 10 Feb 2023

Keywords

  • CoO
  • Energy conversion
  • MOF
  • OER
  • Wet-chemical process

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